When a baby suddenly has a high fever in the middle of the night, first of all, parents should not panic and should promptly measure the child’s temperature with a mercury thermometer. If the child’s body temperature does not exceed 38 ℃, not particularly serious fever, parents can first try to use physical cooling methods to relieve the symptoms of fever, you can generally use warm water to wipe the child’s back, armpits and thigh roots, the use of physical evaporation of heat absorption reason to the baby heat. At the same time, you can also give your child with a high fever pediatric antipyretic medicine, such as ibuprofen pellets, and to give your child enough water to prevent the child from losing water due to high fever, and then observe your child for a period of time to measure the baby’s temperature again. If the child’s fever does not go down repeatedly or if the child shows abnormalities such as vomiting and poor mental health, it is necessary to take the child to a pediatric clinic immediately for treatment under the guidance of a doctor.